inno pascl检测.net framework

function IsDotNetDetected(version: string; service: cardinal): boolean;
// Indicates whether the specified version and service pack of the .NET Framework is installed.
//
// version -- Specify one of these strings for the required .NET Framework version:
// 'v1.1' .NET Framework 1.1
// 'v2.0' .NET Framework 2.0
// 'v3.0' .NET Framework 3.0
// 'v3.5' .NET Framework 3.5
// 'v4\Client' .NET Framework 4.0 Client Profile
// 'v4\Full' .NET Framework 4.0 Full Installation
// 'v4.5' .NET Framework 4.5
// 'v4.5.1' .NET Framework 4.5.1
// 'v4.5.2' .NET Framework 4.5.2
// 'v4.6' .NET Framework 4.6
// 'v4.6.1' .NET Framework 4.6.1
// 'v4.6.2' .NET Framework 4.6.2
//
// service -- Specify any non-negative integer for the required service pack level:
// 0 No service packs required
// 1, 2, etc. Service pack 1, 2, etc. required
var
key, versionKey: string;
install, release, serviceCount, versionRelease: cardinal;
success: boolean;
begin
versionKey := version;
versionRelease := 0;

// .NET 1.1 and 2.0 embed release number in version key
if version = 'v1.1' then begin
versionKey := 'v1.1.4322';
end else if version = 'v2.0' then begin
versionKey := 'v2.0.50727';
end

// .NET 4.5 and newer install as update to .NET 4.0 Full
else if Pos('v4.', version) = 1 then begin
versionKey := 'v4\Full';
case version of
'v4.5': versionRelease := 378389;
'v4.5.1': versionRelease := 378675; // 378758 on Windows 8 and older
'v4.5.2': versionRelease := 379893;
'v4.6': versionRelease := 393295; // 393297 on Windows 8.1 and older
'v4.6.1': versionRelease := 394254; // 394271 on Windows 8.1 and older
'v4.6.2': versionRelease := 394802; // 394806 on Windows 8.1 and older
end;
end;

// installation key group for all .NET versions
key := 'SOFTWARE\Microsoft\NET Framework Setup\NDP\' + versionKey;

// .NET 3.0 uses value InstallSuccess in subkey Setup
if Pos('v3.0', version) = 1 then begin
success := RegQueryDWordValue(HKLM, key + '\Setup', 'InstallSuccess', install);
end else begin
success := RegQueryDWordValue(HKLM, key, 'Install', install);
end;

// .NET 4.0 and newer use value Servicing instead of SP
if Pos('v4', version) = 1 then begin
success := success and RegQueryDWordValue(HKLM, key, 'Servicing', serviceCount);
end else begin
success := success and RegQueryDWordValue(HKLM, key, 'SP', serviceCount);
end;

// .NET 4.5 and newer use additional value Release
if versionRelease > 0 then begin
success := success and RegQueryDWordValue(HKLM, key, 'Release', release);
success := success and(release >= versionRelease);
end;

result := success and(install = 1) and(serviceCount >= service);
end;

 

begin
if not IsDotNetDetected('v4.6', 0) then begin
MsgBox('MyApp requires Microsoft .NET Framework 4.6.'#13#13
'Please use Windows Update to install this version,'#13
'and then re-run the MyApp setup program.', mbInformation, MB_OK);
result := false;
end else
result := true;
end;